Code Updates

02/02/2000  Added  ibitpack.c 
         Pixel format conversion: packed to and from multiplane

03/01/2000 Adam Hoult <admin@daedalusd.com> 
        added sketch filter.

03/04/2000 Adam Hoult <admin@daedalusd.com> 
        added PSD 32bits reading capability.

Bug fixs:

02/17/2000 Adam Hoult <admin@daedalusd.com> 
        fixed the missed pointer increaments in img_c24.c

05/05/2000 Yudong Yang  
        fixed newly imported FreePicture bug.

10/29/2000 Yudong Yang  
        Fixed bicubic interpolation bug.
        Added a VirtualDub plugin interface.
        Added Win32 DLL declaration in file headers.
